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A Representation for $F$-Regular Semigroups

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Abstract

A regular (inverse) semigroup S is called F-regular (F-inverse), if each class of the least group congruence σS contains a greatest element with respect to the natural partial order on S. Such a semigroup is necessarily an E-unitary regular (hence orthodox) monoid. We show that each F-regular semigroup S is isomorphic to a well determined subsemigroup of a semidirect product of a band X by S/σS, where X belongs to the band variety, generated by the band of idempotents ES of S. Our main result, Theorem 4, is the regular version of the corresponding fact for inverse semigroups, and might be useful to generalize further features of the theory of F-inverse semigroups to the F-regular case.

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  1. Universitat Kassel, FB-17 Mathematik/Informatik Hollandische Str. 36, D-34127 Kassel, Germany

    Bernd Billhardt

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  1. Bernd Billhardt
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Correspondence to Bernd Billhardt.

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Billhardt, B. A Representation for $F$-Regular Semigroups. Semigroup Forum 70, 243–251 (2005). https://doi.org/10.1007/s00233-004-0156-7

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  • DOI: https://doi.org/10.1007/s00233-004-0156-7

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